Dark Matter And Energy

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  • 1. Dark Matter and Energy By Ben T.
  • 2. Dark Energy
    • More is known about it than what is actually known.
    • The universe is decided to be 70% dark energy, 25% dark matter, less than 5% normal matter.
    • Scientist are blaming dark energy for the expansion of the universe.
  • 3. Explanations for Dark Energy
    • It’s a property of space.
    • Empty space can posses it’s own energy.
    • Quantum theory of matter- "empty space" is actually full of temporary ("virtual") particles that continually form and then disappear.
    • It’s a new type of dynamical energy, possibly a fluid or field that has the opposite effect on universe expansion than normal matter and energy.
    • Einstein’s theory of gravity is not correct.
  • 4. What Needs to be Done
    • In order to make a decision between all of the different possibilities is simply more data and better data. There is a mission in the planning stages that will provide Universe observations for theorists to discriminate between the theories with. Until then the mystery remains.
  • 5. Visual The image above shows how the universe has expanded over time. Scientists have theorized that the accelerated expansion is due to a mysterious dark energy
  • 6. Dark Matter
    • We are more sure what it’s not that what it is.
    • Its not,
      • In the forms of stars and planets that we see.
      • Dark clouds of normal matter.
      • Antimatter because antimatter gives up gamma rays and we don’t see that with the dark matter.
      • Incredibly large black holes.
  • 7. It might be…
    • There are a few possibilities left .
    • It could still be baryonic matter if it were to be tied up in brown dwarfs or in small highly dense bits of heavy elements.
    • The most plausible possibility however is that it is not baryonic but rather made up of more exotic particles such as axions or WIMPS. (Weakly Interacting Massive Particles)
  • 8. New Breakthrough
    • The Hubble Space Telescope and Chandra X-ray observatory have captured observations of powerful collisions of galaxy clusters. The observations seem to indicate that a titanic collision has separated dark from ordinary matter. This seems to be similar to the Bullet Cluster showing that the Bullet Cluster is not a unique case.
  • 9.  
  • 10. Bibliography
    • above, scientists have come up with the composition that we described, ~70% dark energy, ~25% dark matter, and ~5% normal matter. What is dark matter?. &quot;Dark Energy, Dark Matter — NASA Science.&quot; NASA Science . N.p., n.d. Web. 12 Jan. 2010. < http://nasascience.nasa.gov/astrophysics/what-is-dark-energy >.